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Dennis I. Spencer
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Henderson, CO, US
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last 30 patents
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Patent Grant
Knife structure for shoring assemblies used in excavations
Patent number
5,527,137
Issue date
Jun 18, 1996
Dennis I. Spencer
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Protective structure for excavations
Patent number
5,310,290
Issue date
May 10, 1994
Dennis I. Spencer
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Wheeled carriage assembly for trench shields
Patent number
5,306,103
Issue date
Apr 26, 1994
Dennis I. Spencer
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING